linux-kernel - Re: [PATCH -v4] crypto: Add PCLMULQDQ accelerated GHASH implementation

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Date:	Mon, 2 Nov 2009 16:46:04 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Huang Ying <ying.huang@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	Daniel Walker <dwalker@...o99.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH -v4] crypto: Add PCLMULQDQ accelerated GHASH
	implementation


* Herbert Xu <herbert@...dor.apana.org.au> wrote:

> On Mon, Nov 02, 2009 at 03:32:58PM +0100, Ingo Molnar wrote:
> > 
> > Please use the standard construct and put an #ifndef __ASSEMBLY__ around 
> > it.
> 
> You mean like this?
> 
> diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h
> index 0b20bbb..e22d237 100644
> --- a/arch/x86/include/asm/i387.h
> +++ b/arch/x86/include/asm/i387.h
> @@ -10,6 +10,13 @@
>  #ifndef _ASM_X86_I387_H
>  #define _ASM_X86_I387_H
>  
> +#ifdef __ASSEMBLY__
> +
> +#define PSHUFB_XMM5_XMM0 .byte 0x66, 0x0f, 0x38, 0x00, 0xc5
> +#define PSHUFB_XMM5_XMM6 .byte 0x66, 0x0f, 0x38, 0x00, 0xf5
> +
> +#else
> +
>  #include <linux/sched.h>
>  #include <linux/kernel_stat.h>
>  #include <linux/regset.h>
> @@ -411,4 +418,5 @@ static inline unsigned short get_fpu_mxcsr(struct task_struct *tsk)
>  	}
>  }
>  
> +#endif /* __ASSEMBLY__ */
>  #endif /* _ASM_X86_I387_H */

Yeah. Or just a single block of:


  #ifndef __ASSEMBLY__
  ...
  #endif /* __ASSEMBLY__ */

around the C bits - anything outside that is good for assembly as well. 

	Ingo
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